At some point in recent years, a ghost in the urban planning machine put up 700 rogue stop signs in Cranston, Rhode Island, (pop. 80,000; stop sign pop. 2,600). They're totally undocumented, and the city can't figure out where exactly they came from. But after an investigation by a specially appointed committee,… »2/08/11 9:00pm 2/08/11 9:00pm